Navien
Navien Flow Control Valve 30011277A
Flow control valve for the Navien NCB300-28K Combi boiler, part number 30011277A.
At a glance
- Part type: flow control valve
- Appliance family: NCB300-28K Combi
£5.21
£4.34 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The flow control valve is a Navien component listed under part number 30011277A. It is fitted to the Navien NCB300-28K Combi boiler and regulates water flow through the appliance circuit. It is a serviceable part intended for replacement when flow control is lost or the valve no longer regulates correctly.
Signs this part needs replacing
- Domestic hot water flow rate is reduced or inconsistent at the outlets
- Hot water temperature fluctuates during draw-off despite steady demand
- The valve body shows scale, debris build-up or restricted movement
- Boiler reports a flow-related fault or shuts down during hot water demand
- Audible noise or vibration from the valve area when water is drawn
Before you order
- Confirm the appliance is a Navien NCB300-28K Combi
- Check the existing valve against part number 30011277A before ordering
- Inspect the valve body and surrounding pipework for scale or debris that may also need clearing
- Verify the fault is not caused by a separate flow or sensor issue before replacing the valve
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — | |
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
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Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.